induced forces.
Some aircraft have preflight test
sequences required in addition to the
general procedures described here.
See the
FAA
approved Aircraft Flight
Manual Supplement for your particular
aircraft for details.
Autopilot Automatic Self Test
1.
Allow
3-4
minutes after inverters
and avionics power are on for gyros to
erect and HDG and ATTITUDE flags
to clear.
2.
AP OisconneMaiI, Trim Fail
(see
Flight Manual Supplement for annun-
ciation provided in your aircraft)
Annunciator illuminates upon initial
application of power to the autopilot
and then extinguishes after successful
completion of the
self
test. Allow
60
seconds after gyros are valid.
Caution:
Taxi with caution. The
autopilot temporatik engages the
servo clutches during the automatic
self test. Be prepared to overpower
the autopilot as required. Self test
sequences run while the aircraft is
airborne will not engage clutches or
run
servo
motors.
:artup Procedures
I
1
7
Air
Data
System Self Test
1.
Momentarily press Bar0 set knob to
commence Air Data System automatic
self test. (A second push during the
I
test aborts
the
remainder of the-test.)
On
KAV
485
observe
the
follow-
ing:
1.
All digit segments, flags and
annunciations momentarily appear.
2.
Preselected altitude displays
28,000
ft. Altitude display starts at
26,800
ft.
and increases
at
6,000
ft/
min. Altitude alert activates at
27,000
feet, alert goes out at
27,700
ft.
and
then flashes at
28,000
ft. Altitude then
decreases at 6,000 ft/min and altitude
alert activates at
27,700
ft.
An audio
alert will sound
1,000
ft.
before and
300
ft. after reaching the selected
altitude.
3.
ALT,
VS,
and FAIL momentarily
flag.
4.
Density altitude appears in the
altitude select window for
5
seconds.
5.
All displays return to normal.
Note:
KAV
485
on the copilot side in
a
dual installation will not provide
altitude alerting described above.
32
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